title: Three-year efficacy and acceptability of the GyneFix 200 intrauterine system.
mesh_terms: D000293:Adolescent; D000328:Adult; D001530:Belgium; D002681:China; D003274:Contraceptive Devices, Female; D004869:Equipment Safety / Q000592:standards; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007435:Intrauterine Devices, Copper; D008875:Middle Aged; D010865:Pilot Projects; D013997:Time Factors